High memory for application
This alert triggers when the application process uses too much memory.
For more info, you can also read the page for the alert that triggers when a machine is out of memory.
Fix memory leaks
A common cause of the alerts are memory leaks. For Rails applications you can try diagnosing the error with the derailed gem.
Restart the application
If you can’t find the source of the memory leak you can restart the application.
Increase the alerting threshold
Sometimes the alerting thresholds are too low. You can change them in common.yml
govuk::apps::the_warning::nagios_memory_warning: 2500 govuk::apps::the_warning::nagios_memory_critical: 2500